Use clipping planes instead of scissor for ScrollableTextLayout.
Use clipping planes instead of scissor for ScrollableTextLayout.

qbektrix/pyglet,gdkar/pyglet,kmonsoor/pyglet,odyaka341/pyglet,cledio66/pyglet,arifgursel/pyglet,arifgursel/pyglet,Alwnikrotikz/pyglet,gdkar/pyglet,mpasternak/pyglet-fix-issue-518-522,mpasternak/michaldtz-fix-552,odyaka341/pyglet,mpasternak/michaldtz-fixes-518-522,cledio66/pyglet,Alwnikrotikz/pyglet,xshotD/pyglet,arifgursel/pyglet,Austin503/pyglet,qbektrix/pyglet,mpasternak/pyglet-fix-issue-518-522,mpasternak/michaldtz-fixes-518-522,odyaka341/pyglet,gdkar/pyglet,google-code-export/pyglet,cledio66/pyglet,shaileshgoogler/pyglet,gdkar/pyglet,qbektrix/pyglet,arifgursel/pyglet,qbektrix/pyglet,gdkar/pyglet,mpasternak/pyglet-fix-issue-552,kmonsoor/pyglet,mpasternak/pyglet-fix-issue-552,google-code-export/pyglet,shaileshgoogler/pyglet,xshotD/pyglet,mpasternak/pyglet-fix-issue-518-522,Alwnikrotikz/pyglet,mpasternak/pyglet-fix-issue-552,mpasternak/michaldtz-fixes-518-522,qbektrix/pyglet,Austin503/pyglet,odyaka341/pyglet,xshotD/pyglet,shaileshgoogler/pyglet,kmonsoor/pyglet,shaileshgoogler/pyglet,google-code-export/pyglet,mpasternak/michaldtz-fix-552,kmonsoor/pyglet,google-code-export/pyglet,mpasternak/michaldtz-fixes-518-522,Austin503/pyglet,cledio66/pyglet,kmonsoor/pyglet,Alwnikrotikz/pyglet,google-code-export/pyglet,Austin503/pyglet,cledio66/pyglet,xshotD/pyglet,arifgursel/pyglet,mpasternak/pyglet-fix-issue-518-522,Austin503/pyglet,mpasternak/pyglet-fix-issue-552,xshotD/pyglet,mpasternak/michaldtz-fix-552,Alwnikrotikz/pyglet,odyaka341/pyglet,shaileshgoogler/pyglet,mpasternak/michaldtz-fix-552